Is it Super Man or Richard Simmons?

The other day I was in the kitchen and when I turned around this is what greeted me:




Ezra usually dresses up everyday as something. Typically he's either Spiderman or a cowboy, this time I wasn't sure so I asked him, "Hey Mister, who are you today?" he replied, "I'm Superman!" hmmmm.. does Superman also "sweat to the "oldies"?